Federal Reserve Bank of Dallas. "Regulation T, Circular No. 81-222," District Notices (Federal Reserve Bank of Dallas) (November 23, 1981). https://fraser.stlouisfed.org/title/5569/item/541404, accessed on November 21, 2018.
Credit by Broker and Dealers. Comment on Proposed Amendment to Permit Use of Letters of Credit as Required Deposit When Borrowing Securities Docket No. R-0370 by 1-5-82.